No one can ever be sure until the company finally comes out with the progduct but all I can do is quote the motorola.ca website under tech specs (I have cut and paste exactly what they have listed):
<LI class=sub>NETWORKS3
GSM w/HSDPA, GSM 850/1900, HSUPA, GPRS Class 12, WiFi
The 3G in Telus/Rogers Canada (probably ATT US as well) operates at 850/1900 unlike the 900/2100 in Asia. The asian motorola website specifically says:
3G
WCDMA 900/ 2100 MHz, GSM 850/ 900/ 1800/ 1900 MHz
So the answer in the motorola website is:
Canadian: 850/1900 (thats not quad band) with 3G in North America
Asian/Europian: 850/900/1800/1900 with no 3G with Rogers and Telus (probably ATT US). I have the Asian and do not get 3G.
The other problem will of course be that the Canadian phone will be locked to Telus.